Cross-arm for electric or signal wires.



S. S. CORNELIUS.

,CROSS ARM FOR ELECTRIC 0R SIGNAL WIRES.

APPLICATION FILED 8.9.1915- Patented Apr. 25,1916.

UNITED STATES PATENT OFFICE.

SAMUEL S. CORNELIUS, OF CORINTH, MISSISSIPPI.

CROSS-ARM FOR ELECTRIC OR SIGNAL WIRES.

To all whom it may concern Be it known that I, SAMUEL S. CORNELIUS, a citizen of the United States, residing at Corinth, in the county of Alcorn and State of Mississippi, have invented new and useful Improvements in Cross-Arms for Electric or Signal -Wires, of which the following is a sp ecification.

The invention relates to a cross arm for electric or signal Wiring, and is especially adapted for use on posts or poles.

The primary object of the invention is the provision of a cross arm wherein the construction thereof serves to shed water, sleet or snow from the insulators, to which are adapted to be connected the electric wires, for protection to said insulators.

Another object of the invention is the provision of a cross arm wherein the construction thereof prevents the decay or rotting of the same resultant from moisture penetrating the arm through apertures or openings therein.

A further object of the invention is the provision of a cross arm wherein the bracket and insulators can be fastened thereto so that such fasteners will be protected during inclement Weather, thereby assuring increased life to the cross arm with maximum service.

A still further object of the invention is the provision of a cross arm which is simple in construction, novel in form, strong, durable, reliable and eflicient in use, and inexpensive in manufacture and installation.

WVith these and other objects in view, the invention consists in the construction, combination and arrangement of parts as will be hereinafter fully described, illustrated in the accompanying drawing, and pointed out in the claims hereunto appended.

In the drawing: Figure 1 is a fragmentary side view of a telegraph pole or post showing the cross arm in end elevation constructed in accordance with the invention applied thereto. Fig. 2 is a front elevation. Fig. 3 is a top plan View. Fig. 4 is a sectional view on the line 44 of Fig. 2. Fig. 5 is a sectional view on the line 5-5 of Fig. 3.

Similar reference characters indicate corresponding parts throughout the several views in the drawing.

Referring to the drawing in detail, A

Specification of Letters Patent.

Patented Apr. 25, 1916.

designates a portion of a pole or post, andB the cross arm connected thereto and constructed in a manner hereinafter fully described. The cross arm B comprises a body 5 which can be of any suitable length and thickness, and constructed from any preferred material, wood being well adapted for ordinary purposes. The body 5 is formed with a rounded upper surface 6, and a concaved or inset bottom surface 7, the marginal edge 8 about the bottom surface 7 being designed to serve as a skirt to protect and shield insulators fastened to the said bottom surface of the arm, the insulators being hereinafter fully described. Secured to the pole or post A is a bracket 10 formed with an offset portion 11 and a fork 12, the arms of which are fixed to thebottom face 7 of the cross arm 13, and in this manner the said cross arm is secured in spaced relation to the pole or post, and is held rigid thereon.

At suitable points on the bottom face 7 of the cross arm B are adapted to be mounted insulators, each comprising an inwardly tapered conical-shaped member 13, preferably made from porcelain, glass or other insulating material, the smaller end being next to the bottom face 7, while the wider end is dished at 1 1 to receive a washer 5 through which is centrally passed a screw fastener 16 which mounts the insulator on the bottom face 7 of the cross arm, the electric wire being fastened to the insulator in any suitable manner. Connected to the arm B and to the post A are suitable braces 17 to hold the same rigid.

From the foregoing description, taken in connection with the accompanying drawing, it is thought that the construction of the device will be clearly understood, and therefore a more extended explanation has been omitted.

What is claimed is 1. A cross arm of the class described having a rounded top throughout its length, and an inset opposite lower face forming a marginal flange about the latter providing an unbroken skirt, and a bracket connected to the inset bottom face and adapted to fasten the cross arm to a support.

2. A cross arm of the class described having a rounded top throughout its length, an inset opposite lower face forming a marginal flange about the latter providing an In testimonv whereof I afiix my signature unbroken skirt, a bracket connected to the in presence of tWo Witnesses. inset bottom face and adapted to fasten the I W cross arm to a support, and an insulator I SAMUEL (JORNILLIUS mounted on the bottom face and having a Witnesses: fastener extending only partially through I. E. JACK, the body. R. A. ANDERSON.

Coplee of this patent may be obtained for five cents each, by addressing the Commissioner of Patent], Washington, D. C. 

